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        data-chapter-title="循环结构"
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                        MXY整理版Python基础
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            <span><b>1.</b> Python的安装和简介</span>
            
            
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                            <b>1.1.</b>
                        
                        Python的基础知识
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                            <b>1.2.</b>
                        
                        Python安装及版本检测
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                            <b>1.3.</b>
                        
                        第一个Python程序
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            <span><b>2.</b> Python的基本语法</span>
            
            
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                        注释及语句分类
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                        命名方式和关键字
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            <span><b>3.</b> Python的变量及数据类型</span>
            
            
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                            <b>3.1.</b>
                        
                        变量
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                            <b>3.2.</b>
                        
                        数据类型
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                            <b>3.3.</b>
                        
                        数据类型转换
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                            <b>3.4.</b>
                        
                        数据类型转换
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            <span><b>4.</b> Python的流程控制</span>
            
            
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                            <b>4.1.</b>
                        
                        顺序结构和分支结构
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                            <b>4.2.</b>
                        
                        循环结构
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            <span><b>5.</b> 函数及作用域</span>
            
            
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                            <b>5.1.</b>
                        
                        函数
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                            <b>5.2.</b>
                        
                        函数文档
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                            <b>5.3.</b>
                        
                        变量的作用域
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                        内部函数和闭包操作
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                            <b>5.5.</b>
                        
                        lambda表达式
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                            <b>5.6.</b>
                        
                        高阶函数
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            <span><b>6.</b> 内置函数及操作</span>
            
            
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                            <b>6.1.</b>
                        
                        字符串相关
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                            <b>6.2.</b>
                        
                        format格式字符串
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                            <b>6.3.</b>
                        
                        内建函数
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                            <b>6.4.</b>
                        
                        列表
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                            <b>6.5.</b>
                        
                        元组
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                            <b>6.6.</b>
                        
                        字典
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                            <b>6.7.</b>
                        
                        集合
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                            <b>6.8.</b>
                        
                        文件操作
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            <span><b>7.</b> 常用的模块</span>
            
            
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                            <b>7.1.</b>
                        
                        String模块
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                            <b>7.2.</b>
                        
                        math模块
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                            <b>7.3.</b>
                        
                        OS模块
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        <li class="chapter " data-level="7.4" data-path="home/7.常用模块/4.zipfile模块.html">
            
                
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                            <b>7.4.</b>
                        
                        zipfile模块
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        <li class="chapter " data-level="7.5" data-path="home/7.常用模块/5.tarfile模块.html">
            
                
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                            <b>7.5.</b>
                        
                        tarfile模块
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        <li class="chapter " data-level="7.6" data-path="home/7.常用模块/6.shutil模块.html">
            
                
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                            <b>7.6.</b>
                        
                        shutil模块
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        <li class="chapter " data-level="7.7" data-path="home/7.常用模块/7.时间相关模块.html">
            
                
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                            <b>7.7.</b>
                        
                        时间相关模块
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        <li class="chapter " data-level="8" >
            
            <span><b>8.</b> 面向对象</span>
            
            
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        <li class="chapter " data-level="8.1" data-path="home/8.面向对象/1.类和对象-上.html">
            
                
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                            <b>8.1.</b>
                        
                        类和对象-上
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                            <b>8.2.</b>
                        
                        类和对象-下
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        <li class="chapter " data-level="8.3" data-path="home/8.面向对象/3.魔术方法.html">
            
                
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                            <b>8.3.</b>
                        
                        魔术方法
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                            <b>8.4.</b>
                        
                        装饰器
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                            <b>8.5.</b>
                        
                        抽象类
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                            <b>8.6.</b>
                        
                        错误和异常处理
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                            <b>8.7.</b>
                        
                        模块和包
                    </a>
            
            
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        <li class="chapter " data-level="9" >
            
            <span><b>9.</b> tkinter模块</span>
            
            
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        <li class="chapter " data-level="9.1" data-path="home/9.tkinter模块/tkinter模块.html">
            
                
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                            <b>9.1.</b>
                        
                        tkinter模块
                    </a>
            
            
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        <li class="chapter " data-level="10" data-path="home/10.网络编程/1.网络编程.html">
            
                
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                            <b>10.</b>
                        
                        网络编程
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        <li class="chapter " data-level="10.1" data-path="home/10.网络编程/2.TCP编程.html">
            
                
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                            <b>10.1.</b>
                        
                        TCP编程
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        <li class="chapter " data-level="10.2" data-path="home/10.网络编程/3.UDP编程.html">
            
                
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                            <b>10.2.</b>
                        
                        UDP编程
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        <li class="chapter " data-level="11" data-path="home/11.多任务/多任务原理.html">
            
                
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                            <b>11.</b>
                        
                        多任务
                    </a>
            
            
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        <li class="chapter " data-level="11.1" data-path="home/11.多任务/1.多进程实现多任务.html">
            
                
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                            <b>11.1.</b>
                        
                        多进程实现多任务
                    </a>
            
            
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        <li class="chapter " data-level="11.2" data-path="home/11.多任务/2.多线程实现多任务.html">
            
                
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                            <b>11.2.</b>
                        
                        多线程实现多任务
                    </a>
            
            
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        <li class="chapter " data-level="11.3" data-path="home/11.多任务/3.协程实现多任务.html">
            
                
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                            <b>11.3.</b>
                        
                        协程实现多任务
                    </a>
            
            
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        </li>
    
        <li class="chapter " data-level="12" >
            
            <span><b>12.</b> Python实战项目</span>
            
            
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        <li class="chapter " data-level="12.1" data-path="home/12.Python实战项目/1.简易计算器.html">
            
                
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                            <b>12.1.</b>
                        
                        简易计算器
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.2" data-path="home/12.Python实战项目/2.自动售货机.html">
            
                
                    <a href="../../home/12.Python实战项目/2.自动售货机.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.2.</b>
                        
                        自动售货机
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.3" data-path="home/12.Python实战项目/3.银行项目.html">
            
                
                    <a href="../../home/12.Python实战项目/3.银行项目.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.3.</b>
                        
                        银行项目
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.4" data-path="home/12.Python实战项目/4.简单的登录注册.html">
            
                
                    <a href="../../home/12.Python实战项目/4.简单的登录注册.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.4.</b>
                        
                        简单的登录注册
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.5" data-path="home/12.Python实战项目/5.双色球.html">
            
                
                    <a href="../../home/12.Python实战项目/5.双色球.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.5.</b>
                        
                        双色球
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.6" data-path="home/12.Python实战项目/6.python垃圾回收机制.html">
            
                
                    <a href="../../home/12.Python实战项目/6.python垃圾回收机制.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.6.</b>
                        
                        python垃圾回收机制
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.7" data-path="home/12.Python实战项目/7.turtle画国旗.html">
            
                
                    <a href="../../home/12.Python实战项目/7.turtle画国旗.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.7.</b>
                        
                        turtle画国旗
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.8" data-path="home/12.Python实战项目/8.turtle画小猪佩奇.html">
            
                
                    <a href="../../home/12.Python实战项目/8.turtle画小猪佩奇.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.8.</b>
                        
                        turtle画小猪佩奇
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="12.9" data-path="home/12.Python实战项目/9.turtle画个表.html">
            
                
                    <a href="../../home/12.Python实战项目/9.turtle画个表.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.9.</b>
                        
                        turtle画个表
                    </a>
            
            
        </li>
    

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                        <h1 id="&#x5FAA;&#x73AF;&#x7ED3;&#x6784;">&#x5FAA;&#x73AF;&#x7ED3;&#x6784;</h1>
<hr>
<p>&#x5FAA;&#x73AF;&#x7ED3;&#x6784;&#x53EF;&#x4EE5;&#x51CF;&#x5C11;&#x6E90;&#x7A0B;&#x5E8F;&#x91CD;&#x590D;&#x4E66;&#x5199;&#x7684;&#x5DE5;&#x4F5C;&#x91CF;(&#x4EE3;&#x7801;&#x91CF;)&#xFF0C;&#x7528;&#x6765;&#x63CF;&#x8FF0;&#x91CD;&#x590D;&#x6267;&#x884C;&#x67D0;&#x6BB5;&#x7B97;&#x6CD5;&#x7684;&#x95EE;&#x9898;&#xFF0C;&#x8FD9;&#x662F;&#x7A0B;&#x5E8F;&#x8BBE;&#x8BA1;&#x4E2D;&#x6700;&#x80FD;&#x53D1;&#x6325;&#x8BA1;&#x7B97;&#x673A;&#x7279;&#x957F;&#x7684;&#x7A0B;&#x5E8F;&#x7ED3;&#x6784;&#x3002;</p>
<p>Python&#x4E2D;&#x5FAA;&#x73AF;&#x7ED3;&#x6784;&#x5206;&#x4E3A;&#x4E24;&#x7C7B;&#xFF0C;&#x5206;&#x522B;&#x662F; <strong>while</strong> &#x548C; <strong>for .. in</strong></p>
<hr>
<h2 id="while-&#x5FAA;&#x73AF;">while &#x5FAA;&#x73AF;</h2>
<p><strong>&#x57FA;&#x672C;&#x683C;&#x5F0F;:</strong></p>
<pre><code class="lang-python"><span class="hljs-keyword">while</span> &#x6761;&#x4EF6;&#x5224;&#x65AD;:
    &#x6761;&#x4EF6;&#x4E3A;&#x771F;&#x65F6;,&#x6267;&#x884C;&#x4EE3;&#x7801;
    ....
</code></pre>
<ul>
<li><p>&#x683C;&#x5F0F;1</p>
<pre><code class="lang-python">  num1,num2 = <span class="hljs-number">3</span>,<span class="hljs-number">5</span>
  <span class="hljs-keyword">while</span> num1 &lt; num2:
      print(<span class="hljs-string">&apos;&#x5982;&#x679C;&#x6761;&#x4EF6;&#x6210;&#x7ACB;&#xFF0C;&#x4F1A;&#x8FDB;&#x5165;&#x5FAA;&#x73AF;&#x4F53;&#xFF0C;&#x6211;&#x6240;&#x5904;&#x7684;&#x8FD9;&#x5757;&#x533A;&#x57DF;&#xFF0C;&#x5C31;&#x662F;&#x5FAA;&#x73AF;&#x4F53;&apos;</span>)
      num1 += <span class="hljs-number">1</span>   <span class="hljs-comment">#&#x63A7;&#x5236;&#x5FAA;&#x73AF;&#x6761;&#x4EF6;&#x4E2D;&#x7684;&#x53D8;&#x91CF;&#xFF0C;&#x5426;&#x5219;&#x8FDB;&#x5165;&#x6B7B;&#x5FAA;&#x73AF;</span>
</code></pre>
<ul>
<li>&#x6B7B;&#x5FAA;&#x73AF;&#xFF1A; &#x6B7B;&#x5FAA;&#x73AF;&#x5C31;&#x662F;&#x5FAA;&#x73AF;&#x4E0D;&#x4F1A;&#x7EC8;&#x6B62;&#x7684;&#x5FAA;&#x73AF;&#x7C7B;&#x578B;&#xFF0C;&#x8BBE;&#x7F6E;&#x6761;&#x4EF6;&#x6C38;&#x8FDC;&#x4E3A;True&#x6765;&#x5B9E;&#x73B0;&#xFF0C;&#x4F46;&#x975E;&#x5E38;&#x5360;&#x7528;&#x8D44;&#x6E90;</li>
</ul>
</li>
<li><p>&#x683C;&#x5F0F;2</p>
<pre><code class="lang-python">  num1,num2 = <span class="hljs-number">3</span>,<span class="hljs-number">5</span>
  <span class="hljs-keyword">while</span> num1 &lt; num2:
      print(<span class="hljs-string">&apos;&#x5982;&#x679C;&#x6761;&#x4EF6;&#x6210;&#x7ACB;&#xFF0C;&#x4F1A;&#x8FDB;&#x5165;&#x5FAA;&#x73AF;&#x4F53;&apos;</span>)
      num1 += <span class="hljs-number">1</span>
  <span class="hljs-keyword">else</span>:
      print(<span class="hljs-string">&apos;&#x6761;&#x4EF6;&#x4E0D;&#x6210;&#x7ACB;&#x65F6;&#xFF0C;&#x6211;&#x4F1A;&#x88AB;&#x8F93;&#x51FA;&apos;</span>)
</code></pre>
<ul>
<li>&#x6CE8;&#x610F;&#xFF1A; while&#x5FAA;&#x73AF;&#x4E2D;&#x7684;else&#x662F;&#x5728;while&#x6761;&#x4EF6;&#x8868;&#x8FBE;&#x5F0F;&#x4E3A;&#x5047;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#x6267;&#x884C;&#x7684;&#x4EE3;&#x7801;&#x5185;&#x5BB9;</li>
</ul>
</li>
<li><p>&#x4E00;&#x4E9B;&#x4F8B;&#x9898;&#xFF1A;</p>
<pre><code class="lang-python">  <span class="hljs-comment"># &#x8BA1;&#x7B97;0-100(&#x5305;&#x542B;100)&#x6240;&#x6709;&#x6570;&#x4E4B;&#x548C;</span>
  num = <span class="hljs-number">0</span>
  total = <span class="hljs-number">0</span>
  <span class="hljs-keyword">while</span> num &lt;= <span class="hljs-number">100</span>:
      total += num
      num += <span class="hljs-number">1</span>
  print(total)

  <span class="hljs-comment"># &#x8F93;&#x51FA;&#x5341;&#x884C;&#x5341;&#x5217;&#x7684;&#x661F;&#x661F;</span>
  i = <span class="hljs-number">0</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      j = <span class="hljs-number">0</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">10</span>:
          print(<span class="hljs-string">&apos;&#x2728;&apos;</span>,end= <span class="hljs-string">&apos;&apos;</span>)
          j += <span class="hljs-number">1</span>
      print(<span class="hljs-string">&apos;\n&apos;</span>,end=<span class="hljs-string">&apos;&apos;</span>)
      i += <span class="hljs-number">1</span>

  <span class="hljs-comment"># &#x4F7F;&#x7528;&#x5355;&#x5FAA;&#x73AF;&#x8F93;&#x51FA;10&#x884C;10&#x5217;&#x7684;&#x661F;&#x661F;</span>
  i = <span class="hljs-number">0</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">100</span>:
      print(<span class="hljs-string">&apos;&#x2728;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
      <span class="hljs-keyword">if</span> i % <span class="hljs-number">10</span> == <span class="hljs-number">9</span>:
          print()
      i += <span class="hljs-number">1</span>

  <span class="hljs-comment"># &#x8F93;&#x51FA;&#x5341;&#x884C;&#x5341;&#x5217;&#x661F;&#x661F;,&#x9694;&#x884C;&#x53D8;&#x8272;</span>
  i = <span class="hljs-number">0</span> 
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      j = <span class="hljs-number">0</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">10</span>:
          <span class="hljs-keyword">if</span> i % <span class="hljs-number">2</span> == <span class="hljs-number">0</span>:
              print(<span class="hljs-string">&apos;&#x2728;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
          <span class="hljs-comment"># &#x9694;&#x5217;&#x53D8;&#x8272;</span>
          <span class="hljs-comment"># if j % 2 == 0:</span>
          <span class="hljs-comment">#    print(&apos;&#x2728;&apos;,end = &apos;&apos;)</span>
          <span class="hljs-keyword">else</span>:
              print(<span class="hljs-string">&apos;&#x2764;&#xFE0F;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
          j += <span class="hljs-number">1</span> 
      print()
      i += <span class="hljs-number">1</span>

  <span class="hljs-comment"># &#x4F7F;&#x7528;&#x5355;&#x5FAA;&#x73AF;&#x5B9E;&#x73B0;&#x9694;&#x884C;&#x53D8;&#x8272;</span>
  i = <span class="hljs-number">0</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">100</span>:
      <span class="hljs-keyword">if</span> (i // <span class="hljs-number">10</span>) % <span class="hljs-number">2</span> == <span class="hljs-number">0</span>: 
          print(<span class="hljs-string">&apos;&#x2728;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
      <span class="hljs-keyword">else</span>:
          print(<span class="hljs-string">&apos;&#x2764;&#xFE0F;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
      <span class="hljs-keyword">if</span> i % <span class="hljs-number">10</span> == <span class="hljs-number">9</span>:
          print()
      i += <span class="hljs-number">1</span>

  <span class="hljs-comment"># &#x8F93;&#x51FA;&#x5341;&#x884C;&#x5341;&#x5217;&#x661F;&#x661F;,&#x4EA4;&#x53C9;&#x53D8;&#x8272;</span>
  i = <span class="hljs-number">0</span> 
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      j = <span class="hljs-number">0</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">10</span>:
          <span class="hljs-keyword">if</span> (j % <span class="hljs-number">2</span> == <span class="hljs-number">0</span> <span class="hljs-keyword">and</span> i % <span class="hljs-number">2</span> == <span class="hljs-number">0</span>) <span class="hljs-keyword">or</span> (i % <span class="hljs-number">2</span> == <span class="hljs-number">1</span> <span class="hljs-keyword">and</span> j % <span class="hljs-number">2</span> == <span class="hljs-number">1</span>):
              print(<span class="hljs-string">&apos;&#x2728;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
          <span class="hljs-keyword">else</span>:
              print(<span class="hljs-string">&apos;&#x2764;&#xFE0F;&apos;</span>,end = <span class="hljs-string">&apos;&apos;</span>)
          j += <span class="hljs-number">1</span> 
      print()
      i += <span class="hljs-number">1</span>
</code></pre>
</li>
</ul>
<h2 id="for--in">for ... in</h2>
<p>for &#x53D8;&#x91CF; in &#x5BB9;&#x5668;&#xFF1A;&#x7528;&#x4E8E;&#x904D;&#x5386;&#x5BB9;&#x5668;&#x7C7B;&#x7684;&#x6570;&#x636E;(&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5217;&#x8868;&#xFF0C;&#x5143;&#x7EC4;&#xFF0C;&#x5B57;&#x5178;&#xFF0C;&#x96C6;&#x5408;)</p>
<p><strong>&#x57FA;&#x672C;&#x683C;&#x5F0F;:</strong></p>
<pre><code class="lang-python"><span class="hljs-keyword">for</span> &#x53D8;&#x91CF; <span class="hljs-keyword">in</span> &#x5BB9;&#x5668;:
    &#x5FAA;&#x73AF;&#x4F53;
    ...

&#x5982;&#xFF1A;

user_list = [<span class="hljs-string">&apos;&#x5C0F;&#x660E;&apos;</span>,<span class="hljs-string">&apos;&#x5C0F;&#x7EA2;&apos;</span>,<span class="hljs-string">&apos;&#x5C0F;&#x5F3A;&apos;</span>,<span class="hljs-string">&apos;&#x5C0F;&#x519B;&apos;</span>]
<span class="hljs-keyword">for</span> val <span class="hljs-keyword">in</span> user_list:
    print(val)
</code></pre>
<ul>
<li><p>&#x904D;&#x5386;&#x9664;&#x5B57;&#x5178;&#x5916;&#x7684;&#x4E0D;&#x7B49;&#x957F;&#x7684;&#x4E8C;&#x7EA7;&#x5BB9;&#x5668;(&#x5217;&#x8868;,&#x5143;&#x7EC4;,&#x96C6;&#x5408;)</p>
<pre><code class="lang-python">  <span class="hljs-keyword">for</span> &#x53D8;&#x91CF;<span class="hljs-number">1</span> <span class="hljs-keyword">in</span> &#x5BB9;&#x5668;:
      <span class="hljs-keyword">for</span> &#x53D8;&#x91CF;<span class="hljs-number">2</span> <span class="hljs-keyword">in</span> &#x53D8;&#x91CF;<span class="hljs-number">1</span>:
          &#x5FAA;&#x73AF;&#x4F53;
          ...
</code></pre>
</li>
<li><p>&#x904D;&#x5386;&#x7B49;&#x957F;&#x7684;&#x4E8C;&#x7EA7;&#x5BB9;&#x5668;</p>
<pre><code class="lang-python">  list1 = [
      [<span class="hljs-string">&apos;a&apos;</span>,<span class="hljs-string">&apos;b&apos;</span>,<span class="hljs-string">&apos;c&apos;</span>],
      [<span class="hljs-string">&apos;d&apos;</span>,<span class="hljs-string">&apos;e&apos;</span>,<span class="hljs-string">&apos;f&apos;</span>],
      [<span class="hljs-string">&apos;g&apos;</span>,<span class="hljs-string">&apos;h&apos;</span>,<span class="hljs-string">&apos;i&apos;</span>]
  ]
  <span class="hljs-keyword">for</span> x,y,z <span class="hljs-keyword">in</span> list1:
      print(x,y,z)
</code></pre>
<ul>
<li>&#x8981;&#x6C42;&#x904D;&#x5386;&#x7684;&#x5BB9;&#x5668;&#x5FC5;&#x987B;&#x662F;&#x4EE5;&#x4E0B;&#x51E0;&#x79CD;&#x683C;&#x5F0F;<pre><code>  [(),(),()]    &#x5217;&#x8868;&#x4E2D;&#x6709;&#x5143;&#x7EC4;
  [[],[],[]]    &#x5217;&#x8868;&#x4E2D;&#x6709;&#x5217;&#x8868;
  ((),(),())    &#x5143;&#x7EC4;&#x4E2D;&#x6709;&#x5143;&#x7EC4;
  {(),(),()}    &#x96C6;&#x5408;&#x4E2D;&#x6709;&#x5143;&#x7EC4;
</code></pre></li>
</ul>
</li>
<li><p>&#x904D;&#x5386;&#x5B57;&#x5178;&#x4E2D;&#x7684;&#x952E;&#x548C;&#x503C;:</p>
<pre><code class="lang-python">  <span class="hljs-comment"># &#x9ED8;&#x8BA4;&#x904D;&#x5386;&#x952E;&#xFF0C;&#x518D;&#x6839;&#x636E;&#x952E;&#x6253;&#x5370;&#x503C;</span>
  <span class="hljs-keyword">for</span> key <span class="hljs-keyword">in</span> dict1:
  print(key,dict1[key])

  &#x6216;&#x8005;
  <span class="hljs-comment"># &#x904D;&#x5386;&#x952E;&#x548C;&#x503C;&#x7EC4;&#x6210;&#x5143;&#x7EC4;</span>
  <span class="hljs-keyword">for</span> key,value <span class="hljs-keyword">in</span> dict1.items():
      print(key,value)

  &#x6216;&#x8005;
  <span class="hljs-comment"># &#x904D;&#x5386;&#x952E;</span>
  <span class="hljs-keyword">for</span> key <span class="hljs-keyword">in</span> dict1.keys():
      print(key)

  &#x6216;&#x8005;
  <span class="hljs-comment"># &#x904D;&#x5386;&#x503C;</span>
  <span class="hljs-keyword">for</span> value <span class="hljs-keyword">in</span> dict1.values():
      print(value)
</code></pre>
</li>
<li><p><strong>&#x6CE8;&#x610F;</strong></p>
<pre><code class="lang-python">  data = (<span class="hljs-string">&apos;a&apos;</span>,<span class="hljs-string">&apos;b&apos;</span>,<span class="hljs-string">&apos;c&apos;</span>,<span class="hljs-string">&apos;d&apos;</span>,<span class="hljs-string">&apos;e&apos;</span>)
  <span class="hljs-keyword">for</span> v <span class="hljs-keyword">in</span> data:
      print(v)
  <span class="hljs-keyword">else</span>:
      print(<span class="hljs-string">&apos;&#x6211;else&#x533A;&#x95F4;&#x53C8;&#x6765;&#x5566;&#xFF01;&apos;</span>)
</code></pre>
<ul>
<li>&#x5FAA;&#x73AF;&#x7ED3;&#x675F;&#x65F6;&#x6267;&#x884C;else&#x533A;&#x95F4;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x5FAA;&#x73AF;&#x82E5;&#x662F;&#x88AB;&#x4E2D;&#x9014;break&#x6216;&#x8005;&#x6709;&#x8FD4;&#x56DE;&#x503C;&#xFF0C;&#x4E4B;&#x540E;&#x7684;else&#x4E5F;&#x4E0D;&#x4F1A;&#x6267;&#x884C;&#x4E86;</li>
<li>while &#x5FAA;&#x73AF;&#x4E5F;&#x7C7B;&#x4F3C;</li>
</ul>
</li>
<li><p>&#x4E00;&#x4E9B;&#x4F8B;&#x9898;</p>
<pre><code class="lang-python">  <span class="hljs-comment"># -*- coding:utf-8 -*-</span>
  <span class="hljs-comment"># &#x4E5D;&#x4E5D;&#x4E58;&#x6CD5;&#x8868;&#x7684;&#x56DB;&#x79CD;&#x5F62;&#x5F0F; for&#x5FAA;&#x73AF;</span>

  <span class="hljs-comment"># &#x7B2C;&#x4E00;&#x79CD;</span>
  <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">10</span>):
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>+i):
          print(<span class="hljs-string">&quot;%sx%s=%2s\t&quot;</span> % (j, i, i*j), end=<span class="hljs-string">&quot;&quot;</span>)
      print()

  <span class="hljs-comment"># &#x7B2C;&#x4E8C;&#x79CD;</span>
  <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">10</span>):
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">11</span>-i):
          print(<span class="hljs-string">&quot;%sx%s=%2s\t&quot;</span> % (j, i+(j-<span class="hljs-number">1</span>), (i+(j-<span class="hljs-number">1</span>))*j), end=<span class="hljs-string">&quot;&quot;</span>)
      print()

  <span class="hljs-comment"># &#x7B2C;&#x4E09;&#x79CD;</span>
  <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">10</span>):
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">2</span>, <span class="hljs-number">1</span>+i):
          print(<span class="hljs-string">&quot;\t\t&quot;</span>, end=<span class="hljs-string">&quot;&quot;</span>)
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">11</span> - i):
          print(<span class="hljs-string">&quot;%sx%s=%2s\t&quot;</span> % (j, i + (j - <span class="hljs-number">1</span>), (i + (j - <span class="hljs-number">1</span>)) * j), end=<span class="hljs-string">&quot;&quot;</span>)
  print()

  <span class="hljs-comment"># &#x7B2C;&#x56DB;&#x79CD;</span>
  <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">10</span>):
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">2</span>, <span class="hljs-number">11</span>-i):
          print(<span class="hljs-string">&quot;\t\t&quot;</span>, end=<span class="hljs-string">&quot;&quot;</span>)
      <span class="hljs-keyword">for</span> j <span class="hljs-keyword">in</span> range(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>+i):
          print(<span class="hljs-string">&quot;%sx%s=%2s  &quot;</span> % (j, i, i*j), end=<span class="hljs-string">&quot;&quot;</span>)
      print()
</code></pre>
<pre><code class="lang-py">  <span class="hljs-comment"># -*- coding:utf-8 -*-</span>
  <span class="hljs-comment"># &#x4E5D;&#x4E5D;&#x4E58;&#x6CD5;&#x8868;&#x7684;&#x56DB;&#x79CD;&#x5F62;&#x5F0F; while</span>

  <span class="hljs-comment"># &#x7B2C;&#x4E00;&#x79CD;</span>
  i = <span class="hljs-number">1</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      j = <span class="hljs-number">1</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">1</span>+i:
          print(<span class="hljs-string">&quot;%sx%s=%2s  &quot;</span> % (j, i, j*i), end=<span class="hljs-string">&quot;&quot;</span>)
          j += <span class="hljs-number">1</span>
      print()
      i += <span class="hljs-number">1</span>

  print(<span class="hljs-string">&quot;===============================&#x5206;&#x9694;&#x7B26;==================================&quot;</span>)

  <span class="hljs-comment"># &#x7B2C;&#x4E8C;&#x79CD;</span>
  i = <span class="hljs-number">1</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      k = <span class="hljs-number">1</span>
      <span class="hljs-keyword">while</span> k &lt; <span class="hljs-number">10</span>-i:
          print(<span class="hljs-string">&quot;\t\t&quot;</span>, end=<span class="hljs-string">&quot;&quot;</span>)
          k += <span class="hljs-number">1</span>
      j = <span class="hljs-number">1</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">1</span>+i:
          print(<span class="hljs-string">&quot;%sx%s=%2s  &quot;</span> % (j, i, j*i), end=<span class="hljs-string">&quot;&quot;</span>)
          j += <span class="hljs-number">1</span>
      print()
      i += <span class="hljs-number">1</span>

  print(<span class="hljs-string">&quot;===============================&#x5206;&#x9694;&#x7B26;==================================&quot;</span>)

  <span class="hljs-comment"># &#x7B2C;&#x4E09;&#x79CD;</span>
  i = <span class="hljs-number">1</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      j = <span class="hljs-number">1</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">11</span>-i:
          print(<span class="hljs-string">&quot;%sx%s=%2s  &quot;</span> % (j, i+(j-<span class="hljs-number">1</span>), (i+(j-<span class="hljs-number">1</span>))*j), end=<span class="hljs-string">&quot;&quot;</span>)
          j += <span class="hljs-number">1</span>
      print()
      i += <span class="hljs-number">1</span>

  print(<span class="hljs-string">&quot;===============================&#x5206;&#x9694;&#x7B26;==================================&quot;</span>)

  <span class="hljs-comment"># &#x7B2C;&#x56DB;&#x79CD;</span>
  i = <span class="hljs-number">1</span>
  <span class="hljs-keyword">while</span> i &lt; <span class="hljs-number">10</span>:
      k = <span class="hljs-number">2</span>
      <span class="hljs-keyword">while</span> k &lt; <span class="hljs-number">1</span>+i:
          print(<span class="hljs-string">&quot;\t\t&quot;</span>, end=<span class="hljs-string">&quot;&quot;</span>)
          k += <span class="hljs-number">1</span>
      j = <span class="hljs-number">1</span>
      <span class="hljs-keyword">while</span> j &lt; <span class="hljs-number">11</span>-i:
          print(<span class="hljs-string">&quot;%sx%s=%2s  &quot;</span> % (j, i+(j-<span class="hljs-number">1</span>), (i+(j-<span class="hljs-number">1</span>))*j), end=<span class="hljs-string">&quot;&quot;</span>)
          j += <span class="hljs-number">1</span>
      print()
      i += <span class="hljs-number">1</span>
</code></pre>
<p>  <img src="../images/&#x4E5D;&#x4E5D;&#x4E58;&#x6CD5;&#x53E3;&#x8BC0;&#x8868;.png" alt=""></p>
</li>
</ul>
<hr>
<h2 id="&#x6D41;&#x7A0B;&#x63A7;&#x5236;&#x8BED;&#x53E5;">&#x6D41;&#x7A0B;&#x63A7;&#x5236;&#x8BED;&#x53E5;</h2>
<h3 id="break">break</h3>
<pre><code>&#x7FFB;&#x8BD1;&#xFF1A;&#x7834;&#x574F;&#xFF0C;&#x7ED3;&#x675F;
&#x4F5C;&#x7528;&#xFF1A;&#x5728;&#x5FAA;&#x73AF;&#x4E2D;break&#x7684;&#x4F5C;&#x7528;&#x662F;&#x7EC8;&#x6B62;&#x5F53;&#x524D;&#x5FAA;&#x73AF;&#x7ED3;&#x6784;&#x7684;&#x540E;&#x7EED;&#x6240;&#x6709;&#x64CD;&#x4F5C;&#xFF0C;&#x4E00;&#x65E6;&#x7A0B;&#x5E8F;&#x8FD0;&#x884C;&#x4E86;break&#xFF0C;&#x5FAA;&#x73AF;&#x4E5F;&#x5C31;&#x7EC8;&#x6B62;&#x4E86;
</code></pre><ul>
<li>&#x5982;: &#x8F93;&#x51FA;0-100(&#x5305;&#x542B;100)&#x7684;&#x6570;&#x5B57;,&#x9047;&#x5230;44&#x5219;&#x505C;&#x6B62;&#x5FAA;&#x73AF;<pre><code class="lang-python">  i = <span class="hljs-number">0</span>:
  <span class="hljs-keyword">while</span> i &lt;= <span class="hljs-number">100</span>:
      <span class="hljs-keyword">if</span> i == <span class="hljs-number">44</span>:
          <span class="hljs-keyword">break</span>
      print(i)
      i += <span class="hljs-number">1</span>
</code></pre>
</li>
</ul>
<h3 id="continue">continue</h3>
<pre><code>&#x7FFB;&#x8BD1;&#xFF1A;&#x7EE7;&#x7EED;
&#x4F5C;&#x7528;&#xFF1A;&#x5728;&#x5FAA;&#x73AF;&#x4E2D;continue&#x7684;&#x4F5C;&#x7528;&#x662F;&#x8DF3;&#x8FC7;&#x672C;&#x6B21;&#x5FAA;&#x73AF;&#xFF0C;&#x5F00;&#x59CB;&#x4E0B;&#x4E00;&#x6B21;&#x5FAA;&#x73AF;&#x3002;continue&#x6267;&#x884C;&#x4E4B;&#x540E;&#x672C;&#x6B21;&#x5FAA;&#x73AF;&#x7684;&#x540E;&#x7EED;&#x4EE3;&#x7801;&#x4E0D;&#x518D;&#x6267;&#x884C;&#xFF0C;&#x76F4;&#x63A5;&#x8FDB;&#x5165;&#x4E0B;&#x4E00;&#x6B21;&#x5FAA;&#x73AF;&#x3002;
</code></pre><ul>
<li>&#x5982;: &#x8F93;&#x51FA;0 -100(&#x5305;&#x542B;100)&#x7684;&#x6570;&#x5B57;,&#x9047;&#x5230;&#x4EFB;&#x4F55;&#x5E26;4&#x7684;&#x5219;&#x8DF3;&#x8FC7;<pre><code class="lang-python">  i = <span class="hljs-number">0</span>
  <span class="hljs-keyword">while</span> i &lt;= <span class="hljs-number">100</span>:
      <span class="hljs-keyword">if</span> i % <span class="hljs-number">10</span> == <span class="hljs-number">4</span> <span class="hljs-keyword">or</span> i // <span class="hljs-number">10</span> == <span class="hljs-number">4</span>:
          i += <span class="hljs-number">1</span>
          <span class="hljs-keyword">continue</span>
      <span class="hljs-keyword">else</span>:
          print(i)
          i += <span class="hljs-number">1</span>
</code></pre>
</li>
</ul>
<h3 id="pass">pass</h3>
<pre><code>&#x7FFB;&#x8BD1;&#xFF1A;&#x5FFD;&#x7565;
&#x4F5C;&#x7528;&#xFF1A;pass&#x662F;&#x6CA1;&#x6709;&#x4EFB;&#x4F55;&#x610F;&#x4E49;&#x7684;&#x7A7A;&#x8BED;&#x53E5;&#xFF0C;&#x4E3B;&#x8981;&#x7528;&#x6765;&#x5360;&#x4F4D;&#x7528;&#xFF0C;&#x907F;&#x514D;&#x8BED;&#x6CD5;&#x9519;&#x8BEF;&#x3002;
</code></pre><h3 id="input">input</h3>
<pre><code>&#x7FFB;&#x8BD1;&#xFF1A;&#x8F93;&#x5165;
&#x4F5C;&#x7528;&#xFF1A;&#x548C;&#x7528;&#x6237;&#x8FDB;&#x884C;&#x4EA4;&#x4E92;&#x5F0F;
</code></pre><ul>
<li>&#x5982;&#xFF0C;&#x8F93;&#x5165;&#x4F60;&#x7684;&#x540D;&#x5B57;&#xFF0C;&#x8F93;&#x5165;&#x6B22;&#x8FCE;&#x8BED;&#x52A0;&#x4F60;&#x7684;&#x540D;&#x5B57;</li>
</ul>
<pre><code class="lang-python">firstName = input(<span class="hljs-string">&apos;Please input your name:&apos;</span>)
print(<span class="hljs-string">&apos;&#x4F60;&#x597D;&#xFF0C;%s&apos;</span> % firstName)
</code></pre>
<h3 id="&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x7B26;&#x7684;&#x8FD0;&#x7528;">&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x7B26;&#x7684;&#x8FD0;&#x7528;</h3>
<pre><code>1. &#x521D;&#x59CB;&#x5316;&#x72B6;&#x6001;&#x6807;&#x8BC6;
2. &#x5224;&#x65AD;&#x683C;&#x5F0F;&#x662F;&#x5426;&#x6B63;&#x786E;
    &#x683C;&#x5F0F;&#x6B63;&#x786E;&#xFF0C;&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x4E0D;&#x53D8;
    &#x683C;&#x5F0F;&#x9519;&#x8BEF;&#xFF0C;&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x6539;&#x53D8;
3. &#x5224;&#x65AD;&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x662F;&#x5426;&#x88AB;&#x6539;&#x53D8;
    &#x5982;&#x679C;&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x88AB;&#x6539;&#x53D8;&#x4E86;
        &#x63D0;&#x793A;&#x683C;&#x5F0F;&#x9519;&#x8BEF;
        &#x521D;&#x59CB;&#x5316;&#x72B6;&#x6001;&#x6807;&#x8BC6;
    &#x5982;&#x679C;&#x72B6;&#x6001;&#x6807;&#x8BC6;&#x672A;&#x88AB;&#x6539;&#x53D8;&#xFF08;&#x8BF4;&#x660E;&#x683C;&#x5F0F;&#x6B63;&#x786E;&#xFF09;
        &#x5224;&#x65AD;&#x5BC6;&#x7801;&#x662F;&#x5426;&#x6B63;&#x786E;
            &#x5BC6;&#x7801;&#x6B63;&#x786E;&#xFF0C;&#x767B;&#x9646;&#x6210;&#x529F;
            break&#xFF08;&#x9000;&#x51FA;&#x5FAA;&#x73AF;&#xFF09;
            &#x5BC6;&#x7801;&#x9519;&#x8BEF;&#xFF0C;&#x63D0;&#x793A;&#x9519;&#x8BEF;&#xFF0C;&#x8BA9;&#x7528;&#x6237;&#x518D;&#x8F93;&#x5165;&#x5BC6;&#x7801;
</code></pre><ul>
<li><p>&#x5982;&#xFF1A;</p>
<pre><code class="lang-py">  flag = <span class="hljs-number">1</span>
  sign = <span class="hljs-keyword">True</span>
  ...
  &#x7B49;&#x7B49;
</code></pre>
</li>
<li><p>&#x5177;&#x4F53;&#x4EE3;&#x7801;&#x5B9E;&#x4F8B;&#xFF0C;&#x4E00;&#x4E2A;&#x7B80;&#x5355;&#x7684;&#x767B;&#x5F55;&#x64CD;&#x4F5C;&#xFF0C;&#x5176;&#x4E2D;<code>islogin</code>&#x5C31;&#x53EF;&#x4EE5;&#x7406;&#x89E3;&#x4E3A;&#x6807;&#x8BC6;&#x7B26;</p>
<pre><code class="lang-py">  f = open(<span class="hljs-string">&quot;user.txt&quot;</span>, <span class="hljs-string">&quot;r&quot;</span>)
  islogin = <span class="hljs-number">0</span> <span class="hljs-comment">#&#x5224;&#x65AD;&#x7528;&#x6237;&#x8FD8;&#x6CA1;&#x6709;&#x767B;&#x9646;</span>
  login_times = <span class="hljs-number">0</span> <span class="hljs-comment">#&#x7528;&#x6237;&#x767B;&#x9646;&#x6B21;&#x6570;</span>
  all = []
  <span class="hljs-keyword">while</span> islogin == <span class="hljs-number">0</span>:
      <span class="hljs-keyword">if</span> islogin == <span class="hljs-number">0</span>:
          <span class="hljs-comment"># &#x5224;&#x65AD; &#x7528;&#x6237;&#x8F93;&#x5165;&#x4E09;&#x6B21;&#x5931;&#x8D25;</span>
          <span class="hljs-keyword">if</span> login_times == <span class="hljs-number">3</span>:
              print(<span class="hljs-string">&quot;&#x767B;&#x9646;&#x4E09;&#x6B21;&#x5931;&#x8D25;&#xFF0C;&#x62DC;&#x62DC;~~~&quot;</span>)
              <span class="hljs-keyword">break</span>
          <span class="hljs-keyword">else</span>:
              f.seek(<span class="hljs-number">0</span>,<span class="hljs-number">0</span>)
              name = input(<span class="hljs-string">&quot;&#x8BF7;&#x8F93;&#x5165;&#x60A8;&#x7684;&#x7528;&#x6237;&#x540D;:&quot;</span>)
              <span class="hljs-comment"># &#x83B7;&#x53D6;&#x6570;&#x636E;&#x5E93;&#x4E2D;&#x7684;&#x6240;&#x6709;&#x7528;&#x6237;&#x540D;&#x548C;&#x5BC6;&#x7801;</span>
              content = f.readlines()
              <span class="hljs-keyword">for</span> var <span class="hljs-keyword">in</span> content:
                  <span class="hljs-comment"># &#x5C06;acount&#x58F0;&#x660E;&#x4E3A;&#x5168;&#x5C40;&#x53D8;&#x91CF;</span>
                  <span class="hljs-keyword">global</span> acount
                  <span class="hljs-comment"># &#x83B7;&#x53D6;&#x6240;&#x6709;&#x7528;&#x6237;&#x540D;</span>
                  acount = var.split(<span class="hljs-string">&quot;:&quot;</span>)[<span class="hljs-number">0</span>]
                  <span class="hljs-comment"># &#x83B7;&#x53D6;&#x6240;&#x6709;&#x5BC6;&#x7801;  &#x5E76;&#x4E14;&#x53BB;&#x6389;&#x672B;&#x5C3E;&#x7684;\n</span>
                  password = var.split(<span class="hljs-string">&quot;:&quot;</span>)[<span class="hljs-number">1</span>][:-<span class="hljs-number">1</span>]
                  <span class="hljs-comment"># &#x5224;&#x65AD;&#x7528;&#x6237;&#x540D;&#x5B58;&#x5728;</span>
                  <span class="hljs-keyword">if</span> name == acount:
                      pwd = input(<span class="hljs-string">&quot;&#x8BF7;&#x8F93;&#x5165;&#x60A8;&#x7684;&#x5BC6;&#x7801;:&quot;</span>)
                      <span class="hljs-comment"># &#x5224;&#x65AD;&#x7528;&#x6237;&#x540D;&#x548C;&#x5BC6;&#x7801;&#x662F;&#x5426;&#x5339;&#x914D;</span>
                      <span class="hljs-keyword">if</span> name == acount <span class="hljs-keyword">and</span> pwd == password:
                          print(<span class="hljs-string">&quot;&#x767B;&#x9646;&#x6210;&#x529F;&#xFF01;&quot;</span>)
                          islogin = <span class="hljs-number">1</span>
                          <span class="hljs-keyword">break</span>
                      <span class="hljs-keyword">else</span>:
                          print(<span class="hljs-string">&quot;&#x60A8;&#x8F93;&#x5165;&#x7684;&#x5BC6;&#x7801;&#x4E0D;&#x6B63;&#x786E;&#xFF0C;&#x8FD8;&#x6709;%s&#x6B21;&#x673A;&#x4F1A;&quot;</span>%(<span class="hljs-number">2</span>-login_times))
                          <span class="hljs-keyword">break</span>
              <span class="hljs-comment">#&#x5224;&#x65AD;&#x7528;&#x6237;&#x540D;&#x4E0D;&#x5B58;&#x5728;</span>
              <span class="hljs-keyword">if</span> name != acount:
                  print(<span class="hljs-string">&quot;&#x7528;&#x6237;&#x540D;&#x4E0D;&#x5B58;&#x5728;&#xFF01;&quot;</span>)
          login_times += <span class="hljs-number">1</span>
  f.close()
</code></pre>
</li>
</ul>

                    
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